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Information
Choice of Polythene
Standard Polythene
EVA / UVI 720g 4 year clear polythene. This is the traditional tunnel polythene and is ideal for tunnels which are used mainly during the warmer months of the year.
Thermal/Anti fog Polythene
EVA / UVI 720g 4 year clear polythene. A co-extruded film with a high vinyl content which allows infra red light to pass through it trapping it inside. This heat retentive film also has anti fog or anti condensation properties which help to stream condensation down the sides of the tunnel reducing reflection and dripping. This type of polythene will warm the tunnel up faster in the morning, keeping a more even temperature during the day and cool down slower at night. A temperature advantage over the standard film of 4°C may be expected. This film is recommended to anyone who wishes to grow plants in the early part of the year or take advantage of autumn and winter growth. Additional protection will be required against hard frosts.
Shade and Windbreak
Netting provides a shaded environment in the summer for plants that do not like direct sunlight and a protective environment for overwintering hardy and semi hardy plant stock. No polythene is included in the Net tunnel kit.
All our polythene is guaranteed against degradation due to Ultra Violet light for 48 months. A sliding scale allowance against replacement cover of 100% in the first month to 1/48th cost in the last month. The guarantee period will be deemed to start on the date of invoice. Customers may be requested to return all or part of the effected cover at their own expense.
Timber for the Doors
Customers who wish to fit their own doors and frames should order a Polytunnel Kit without our timber pack, the value of the materials and carriage charge can be deducted as shown in the price list. It is not possible to erect a polytunnel with out door frames to which the polythene is attached. The specification of the timber required to make the two door frames and cross pieces for the blind door is specified below.
| For 10', 12' and 14' Tunnels |
| 4no |
3" x 2" (75mm x 50mm) |
7' 6" (2.29m) |
| 2no |
3" x 2" (75mm x 50mm) |
4' 4" (1.32m) |
| 11no |
2" x 1" (50mm x 25mm) |
5' 0" (1.52m) |
| For 16' and 18' Tunnels |
| 6no |
3" x 2" (75mm x 50mm) |
9' 0" (2.74m) |
| 10no |
2" x 1" (50mm x 25mm) |
10' 0" (3.05m) |
All timber tanalised softwood or equivalent
Erecting your Polytunnel
- Mark out polytunnel site and drive in the foundation tubes for each hoop. Dig four sides of a moat trench (not door opening) - one spade deep and a spade wide.
- Trench to be three inches outside the floor area of Polytunnel.
- Complete remaining hoops, brace tubes and ridge tubes
- Make up timber for door frames and fix in position using metal straps supplied (see Working Instructions). ANTI HOTSPOT TAPE can be applied at this stage to protect the cover.
- Cover structure with sheeting, stretch from end to end and secure cover to door frames. Fill in trench, burying a generous overlap of the sheeting. Make up the blind doors and fit to door frame.
- Polytunnels can be erected on concreted or paved areas by concreting the foundation tubes and fastening the polythene to a cladding rail at ground level.
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